Conveyer for furnaces



C. D. BARNHART, ce'rwmk FOR FURNACES.

APPLICATIONHLEDSEPTJBfiIQ v i 11 333 371 Patented Mar. 9,1920.

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o. BA'RNHAR T- YER FOR FURNACES. on FILED SEPIJB. m9.

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I U FIR .1 (v U M l u lll lllllllilll llllllr w w wg are discharged into a tank of water, oil or -chain's, which chains carry mmum GLARENCE n. BAR'NHART,

GORE-ANY, or new "ironic.

0F BBGOKLYN, NEW YGLRK, ASQIGEOR Tl) W". S. ROCKWELL 1i! 3Z1, A CORPORATIGN ill? NEW JLRSEY I CQNVEYER EOE FUR-WAGES.

Specification of Letters Estonia.

To aZi whom it may concern: 7

Be it known that l, CLARENCE-:1 D. BARN- HAn'r, a citizen of the United States, rcsiding at 2586 Crown street, Brooklyn, county of Kings, and vented certain neu and useful Improvements in Conveyers for Furnaces, fully de scribed and represented in the following specification and the accompanying drewings, forming a part of the same.

This invention relates to a continuous automatic furnace in which the material or Steel; to be treated is placed in pans which are pivoted upon cross-bars Connecting two the pans automatically through the furnace at any predetermined speed, 'ajnd discharge them cutomstically at the end of the required treatment. l

Where the articlesrequire hardening they other quenching liquid and their treatment is thus effected in a single continuous operation. i

Where bright finished goods like brass articles are treated it is very desirable to protect. them from the atmosphere until they are cooled, and such articles also may. be discharged into a Water-tank or similar means of quenching to cool them before any exposure to'the atmosphere.

The invention-embodies a variety of additions and improvements which in such furnacegfacilitate the heating and coolingof the s'tock and render the apparatus completely automatic.

The construction will beunderstood by reference to the annexed drawing, in which Figure 1 is a side elevation of a furnace provided with the improvements, the brickwork being broken away at the left-hand end of the furnace to show the arrangement of the conveyor and outlet-opening. Fig. 2 is a cross section through the outlet-chute taken on line 22 in Fig. 1; Fig. 3' is a section taken on the same line, with a modification of the stock-delivering devices; Fig. e is a plan of the same in horizontal section on line H in Fig. 5, at the-top of the channels which inclose the chain; Fig. 5 is a cross section on line 55 in Fig. i; Fig. 6 is a longitudinal section taken at the center line 66 in Fig. i; and Fig. 7 is a longitudinal vertical section of the pre-heatei chamber attached to the inlet of the furnace-chamber.

State of New York, have inthe grooves in ,chill it before exposure the goods from the water and deliver them it extended below Patented Mar. 19,192,

Application filed September 16, 1919. serial Ito, 3243M.

A i'urnaccehaiuber a is shown with longitudinal grooves 71 in the sidewalls a oi the chamber, end endless conveyer-chains 0 are fitted to more in the grooves and extend between driving-wheels (Z at their opposite ends. I

. Cross-bars care connected to the chains, and pans f are pivoted or hinged upon the cross-bars so as ,to be carried therewith.

through the heating-chamber.

These pans are held horizontally in their movement through the chamber why support upon the iioor p of thechaniber, or by track-rails 0 bedded in the floor audp'rojecting upward to contact with the bottoms of the pans. v

The floor is disposed below the level of the side-Walls, so thatthc pans pivoted upon the cross-burs 0 may move some distance above the fioor of the furnacechamber. and thus permit a thorough circulation of the heated gases beneath. the pans; the track rails sustaining the pans in such position above the floor of the chamber.

To discharge the stock automatically from. the'chamber, an outlet 9 is formed in the lloor of the chamber near the dischargepassuge a and means is provided to hold the pans level or in a horizontalposition duringtheir travel through the heating chamber until they reach the 0utlet, where the rails o terniinate, and permit thepansto swing down and into the outlet and laterallytln'ough the side-Wall of the furnace, at a suitable level to discharge directly into a car or box 11, as shown in Fig. 2.. The chute may have a scli-closing cover. it hinged over its mouth, as shown in Fig. 2.

A quenching tank may obviously be placed beneath the chute to receive the stock and to the atmosphere; 8 shows the chute having its nozzle lfig.

the water level 72'- in a tank j, thus operating to cool the goods ithout exposure.

An inclined conveyor 15 shown to remove into the car or receptacle 2.

Burners 1 tor fluid fuel tended through the wall of the furnace to heat the chamber a, and it is obviousvthet the location of the conveyor-chains c'-in the are shown exgrooves at the sidewalls of the chamber redischarge their contents moves the chains from the hottest zone and thus promotes their endurance.

To protect the chains still further from the heat, a metallic channel shown at Z! in Figs. 4, 5 and 6 is inserted in the groove and arranged to wholly inc-lose the chain, excepting a longitudinal slot Z through which the cross-bars 6 project.

These so-called channels are made of metal, in longitudinal sections of any from venient length and built into the sidewalls of the furnace when it is erected.

To economize in the fuel and to gradually heat the pans and stock as they'enter the furnace-chamber, I provide a pre-heater t which is attached to the inlet a of the heat ing-chamber, through which the stock moves before it enters the chamber a.

To properly support the chains and to hold the pans horizontal, I extend the floor of the heating-chamber, and the channels in the side-walls, throughout the whole length of the pre-heater.

A vent-pipe q is shown extended from the pre-heater near its outer end, with a damper g to regulate the escape of gases therefrom; and the provision of such a vent 1 generates a current of the heated gases from the chamber 64 throughout the pre-heater, and thus enables it to produce the pro-heat- -in%effect which is desired.

he gases must escape from some vent,

and the provision of the pro-heater utilizes the Waste heat of such gases in pro-heating the stock.

The conveyer-chains extend outside of the pre-heater a suh'icient distance to aiford an opportunity (with a slow movement of the pans) to char e them with the requiredstock, and it wi be observed that'no further attention is required, as the chains are timed to produce the required exposure of the stock to the heatrwhen the stock is autom atically discharged into a receptacle,

which, if a car, may carry the goods to any desired point without any manual labor in loading the same.

, .I have not made herein any broad claim to extending acooling pipe along the path of a conveyor-chain where propelled through a heated chamber, as I have made such claim in another application co-pending herewith.

Having thus set forth the nature of the invention what is claimed herein is:

1. In a continuous automatic furnace having an outlet in the floor near one end, the combination, with conveyer-chains movable along the opposite sides of the chamber, of cross-bars connecting the chains, and pans hinged upon the cross-bars and held horizontal by supportupon the floor of the furnace excepting at the outlet.

2. In a continuous automatic furnace, the combination, with the side-walls of the fur nacechaznber having grooves therein near position through the chamber to the v 3. In a continuous automatic furnace, the

combination, with the side-walls of the fur:

nace-chamber having grooves therein near the floor of the chamber, of conveyer-chains movable in the grooves, cross-bars connecta ing the chains above the floor of thechamher, pans hinged upon the cross-bars, and

one or more track-rails projected upwardly from the floor of the chamber toward the cross-bars and holding the pans horizontal in their movement through the chamber.

4. In a continuous automatic furnace, the combination, with the sidewalls of the furnace-chamber having grooves therein near the floor of the chamber and an outlet in the floor of the chamber near one end, of conveyor-chains movable in the grooves, cross-bars connecting the, chains, pans hinged upon the cross-bars, and track-rails projected upwardly from the floor of the chamber excepting at the outlet, whereby the pans are held horizontal in their movement through the chamber and dropped into the outlet-to discharge their contentsthereto.

I In a continuous automatic furnace, the combination, with the side-walls of the furnace-chamber having grooves therein near thefioor of the chamber, of metallic channels fitted to the grooves with a-slot upon the inner side of each channel, conveyerchains movable in the channels, cross-bars extended through the slots and connected to the chains, and pans hinged upon the cross-bars whereby the chains are in great measure protected from directcontact with be]. I",

6. A continuous automatic furnace constructed as in claim 4 and having the mouth of the outlet sloped toward the dischargeend of the furnace to restore the pans gradually to a. horizontal position as they leave the furnace-chamber.

- 7. A continuous automatic furnace constructed as in claim 1 and having a preheater casing projected outwardly from the inlet of the furnace-chamber, and the conveyor-chains extended through the preheater, whereby the pans and their contents are pre-heated before their entrance into the furnace-chamber. v

8. In a continuous automatic furnace, the combination, with the'side-walls of the furnace-chamber having grooves therein near the floor of the chamber, of conveyer-chains movable in the grooves, cross-bars connectingi, the chains, and pans hinged upon the CIOSSabZLTS and held horizontal by support I i r upon the floor of the chamber, and a prehea'ter casing extended outward from the inlet of the furnace with thefioor of the furnace and the side-grooves extended through such pie-heater, whereby the chains are protected from excessive heat both in the pie-heater and in themfurnacechamber.

'9. A continuous autoin'atic furnace constructed as in claim 1 and having a sloping chute extended from the outlet in the floor laterally through the side-Wall of the furstructecl as in claim 1 and having a chute extended-from the outlet through the'side- Walllof the furnace with a normally closecl cover hingiug upon its outer end.

In testimony whereof I have hereunto set my hand.

CLARENCE BARNHART. 

